【摘要】 利用十二烷基苯磺酸钠（SDBS）为模板剂,研究了SDBS的浓度,Ca²⁺和SiO■离子的浓度,是否搅拌和反应时间等条件对水合硅酸钙（CSH）形貌特征和分散性能的影响,并提出了不同CSH球壳形貌特征的形成机理.结果显示,溶液中Na₂SiO₃·9H₂O浓度增大, SDBS浓度增大及反应时间延长均会使CSH的结晶度变好,聚合度增大, Q²结构的相对含量增加,其中Na₂SiO₃·9H₂O和SDBS浓度是主要控制因素. SDBS在溶液中形成的球形胶束具有极强的模板作用,能有效改变CSH的结晶生长方式;通过调节SDBS浓度和钙硅比例,并适当延长CSH的生长时间,能够获得球壳完整,分散性好且稳定性强的CSH.更多还原

【Abstract】 The effects of the concentrations of SDBS, Ca²⁺ and SiO■ ions, stirring and reaction time on the dispersibility and morphology of calcium silicate hydrate（CSH） using sodium dodecylbenzene sulfonate（SDBS） as template were investigated, the formation mechanism of different CSH spherical shell morphology features was prpposed. The results showed that the crystallinity and polymerization degree of CSH increased and the relative content of Q² structure increased with the increase of Na₂SiO₃ 9 H₂O concentration, SDBS concentration and reaction time, the concentration of Na₂SiO₃ 9 H₂O and SDBS were the main controlling factors. The spherical micelles formed by SDBS in solution have a strong template action, which effectively changes the crystal growth mode of CSH. By adjusting the concentration of SDBS and the ratio of calcium to silicon and appropriately prolonging the growth time of CSH, the CSH product with complete spherical shell, good disper-sibility and high stability can be obtained.更多还原